- More torque (get a solid piece of tube over the end of the spanner - this has worked for me before) - Remove the crankarm from the bike and try to remove the pedals with the crankarm in a vice (if available) - I've never tried this but I've read about using a gas flame to heat the pedal up to loosen it. I wouldn't do it near carbon components, but depending on how brave you are, it might be worth a shot

If all else fails can I suggest taking it to your LBS? I think you'd be surprised at what they can do!

Heat - a small gas torch or even gas cooktop. Heat the aluminium crank near the pedal axle, then loosen. Aluminium expands a lot faster than steel and this breaks the bond, works an absolute treat. It's been my go to method a number of times.

Marty Moose wrote:Take it too a shop with a park pedal spanner.Most shops have one.

Sent from my MB526 using Tapatalk 2

+1 - a proper pedal spanner designed for the job makes very short work of stuck pedals. Best bike tool in my toolbox.

So we get the leaders we deserve and we elect, we get the companies and the products that we ask for, right? And we have to ask for different things. – Paul Gildingbut really, that's rubbish. We get none of it because the choices are illusory.

Just a caution in case you are trying to use reasoning to establish the direction that you apply the torque.

Set the pedal so it is at around 3 o'clock forward with the handle end of the spanner hanging 9 o'clock to the rear and then press down on the spanner. Do the same with the other side.

You may reason that that will do the same as when you are pedalling which tightens the thread. But because you have a layer of rotating ball bearings between the shaft and the pedal it is in fact the opposite.

And like drubie says. it will budge with the right spanner.

Last edited by ColinOldnCranky on Wed Dec 19, 2012 11:39 am, edited 4 times in total.

- More torque (get a solid piece of tube over the end of the spanner - this has worked for me before) - Remove the crankarm from the bike and try to remove the pedals with the crankarm in a vice (if available) - I've never tried this but I've read about using a gas flame to heat the pedal up to loosen it. I wouldn't do it near carbon components, but depending on how brave you are, it might be worth a shot

If all else fails can I suggest taking it to your LBS? I think you'd be surprised at what they can do!

Never do the torch near carbon, is too risky - the LBS is the best bet. Otherwise, I'd suggest the longest and most solid piece of tube and the park pedal wrench, this will help - and keep your hands well clear of the front chain rings.

I've only ever done this job once and did manage to get a decent gash in the hand after it loosened and whack, got the chain ring. When the pedals loosen, they really loosen.

Before you "get a bigger hammer" I'd consider rigging up a couple of ice-cream containers with WD40 in them so you can soak them in WD40 for 2 or 3 days.

Failing that, add heat as suggested by another poster above.

Brute force should be your absolute last resort.

When you eventually replace the pedals, grease the threads or use Anti-sieze and do them up tight. Many that I've seen jammed on had mashed threads from the pedals being under-tightened at the initial installation. I've heard you can helicoil the pedal threads on some cranks but I have never done this personally.

This won't help after they're stuck, but I remove mine once a month, re-grease the thread then re-fit them. Getting them off if you service them occasionally involves sticking your pedal spanner on & giving it a tap with a rubber mallet (and I do mean tap), just to break the tension.

Wal42 wrote:This won't help after they're stuck, but I remove mine once a month, re-grease the thread then re-fit them. Getting them off if you service them occasionally involves sticking your pedal spanner on & giving it a tap with a rubber mallet (and I do mean tap), just to break the tension.

jacks1071 wrote:When you eventually replace the pedals, grease the threads or use Anti-sieze and do them up tight. Many that I've seen jammed on had mashed threads from the pedals being under-tightened at the initial installation. I've heard you can helicoil the pedal threads on some cranks but I have never done this personally.

+1 to this. I've had similar issues and ever since have lightly greased the threads. No probs since.

Wal42 wrote:This won't help after they're stuck, but I remove mine once a month, re-grease the thread then re-fit them.

Why would you need to re-grease?

The thin layer of grease is not going anywhere, and it's doing its job of preventing electrolytic welds while you leave it there.

Obviously, because I have nothing better to do than service my bikes. I've sort of noticed if you pull things apart regularly, clean, inspect, re-lubricate & re-assemble then you find faults before they happen & everything comes apart without too much force.

But that's my hobby, I don't expect most people to understand where that type of thinking comes from.

once again, thanks to everyone for your useful suggestions. for the record, the very generous Shaun (Mulger Bill) brought his park tool pedal wrench to work, which made light work of the pedals (bar a bit of blood loss). thanks very much Shaun. i'm sure everyone is thrilled to hear this

jules21 wrote:once again, thanks to everyone for your useful suggestions. for the record, the very generous Shaun (Mulger Bill) brought his park tool pedal wrench to work, which made light work of the pedals (bar a bit of blood loss). thanks very much Shaun. i'm sure everyone is thrilled to hear this

Oh yeah, I'm always thrilled about blood loss.

Do tell! Chain ring attack, was it? I've done that to myself a couple of times. You would think once would be enough.

jules21 wrote:once again, thanks to everyone for your useful suggestions. for the record, the very generous Shaun (Mulger Bill) brought his park tool pedal wrench to work, which made light work of the pedals (bar a bit of blood loss). thanks very much Shaun. i'm sure everyone is thrilled to hear this

Well, don't leave us hanging! Whose blood and how was it spilled? I have a lovely scar in the base of my right hand where a chain ring bit me like a white pointer trying to remove a pedal (with the wrong tool ). Haven't hurt myself since I bought a proper pedal spanner so I'm eager to hear the gory details.

So we get the leaders we deserve and we elect, we get the companies and the products that we ask for, right? And we have to ask for different things. – Paul Gildingbut really, that's rubbish. We get none of it because the choices are illusory.

Not much blood, I took a bit of bark off a knuckle against the RH crankarm is all. One well placed bandaid and it's gone. Fact is, it'd be easier to tell people when I don't lose some skin when I approach a crankset with tool in hand.

Shaun

...whatever the road rules, self-preservation is the absolute priority for a cyclist when mixing it with motorised traffic.London Boy 29/12/2011

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